Reinforced back for brake-shoes.



W. G. GHVIPPS. mroncsn BACK PoR BRAKE SHOES.' APPLICATION FILED APR.12.1912. Y 1,036,564 Patented Aug. 27, 1912.

Atty

U'NITED STATES PATENT (DFFICE.

` WILLIS '0.' cHIrlrs, or so-rrEnN, NEW Y'onx, AssIGNon tro EDWAnn'iI.rALLoWs, or

NEW vom; N. Y.

REINFORCED BACK FOR BRAKE-SHOES.

T o all whom #may concern: y

Be it known that I. lVlLLIs C. Cmrrs, a citizen of the United States,and a resident y of Sutl'ern, in 'the county of vRockland and .5 Stateof New Yorlij, have made and invented certain new and usefulImprovements in Reinforced Backs 'for Brake-Shoes, ot" which thefollowing is a specification.

My invention relates to reinforcing backs for brake shoes designed to beembedded in the rear surface or back of the shoe, and serving to holdthe parts' of the shoe together should it become cracked or broken inuse, and 4to which the attaching lug, whereby the shoe is supported froma brake head, is secured, or with which said lug engages.

The object of my invention is to provide an improvedV back in whichsuticient support is afforded for the attaching lug so that it may not.be broken or pulled from the shoe, and in which a sulicientbond issecured between the body of the shoe and the back, considered as a.whole, to prevent the entire back from'being torn or stripped from theshoe. A

Reinforcing backs for brake shoes have heretofore usually been of one oftwo distinct Jforms. In one form a wrought metal or steel plate isemployed', in order that the supporting lugmay not be broken or pulledfrom the shoe. Such a plate, however, notwithstanding numerous schemesemployed for anchoring the same in the body of the shoe, presents tlatsurfaces ol. considerable 'area with which the metal ot' the body cannotsecure a sutlcient bond to hold the plate in place, so that' while suchreinforcing members provide a shoe in which the attach- 40 ing lug isnot likely to be broken or pulled from the shoe, the ent-ire back maybe, and

in fact frequently is, torn or stripped from the shoe because of theinsufficient. bond between it and the body of the shoe.

In another form of reinforcing back a piece of expanded metal or similarforaminous material isemployed, which back while it provides for a goo'dand sullicient bond between it and the body of Vthe shoe, does notafford sufficient; strength at the place -where the attaching lug issecured to it, or engages with the same, so that notwithstanding suchschemes as have been devised for securing a.

sutliciently strong connect-ion between the lug and the expanded metalback, the lug is frequently torn or broken from the shoe,l

Specification of Letters Patent.

carrying with it the portion of the reinforc-4 ing member with which itengages. although the remaining portion of the back remains embedded inthe shoe.

In a brake shoe provided with my improved reinforcing back both thestrength of a steel plate back, and the strong bond secured in anexpanded metal back, are secured in a single structure, and a shoe isprocured in which the attaching lug is not likely to become separatedfrom the back, nor the back pulled away or stripped from the shoe.

Having inview the objects above stated, my invention consists in theimproved reinforcing back for brake shoes hereinafter described andclaimed, and'shown in the accompanying drawing, wherein the preferredembodiment of my inventionis illustrated.

Referring to the dra'\vings:-Figure 1 is a view showing a side.elevation of the brake shoe', and illustrating one of my improvedPatented Aug. 21, 1912. Application medhpvrn 12 1912.- seriaino.690,357.

l'n the drawing. the reference character 4 designates the bod; portionof a brake shoe in the rear face or back of which my improvedreinforcing back is embedded. This reinforcing back is made up of twoseparate members one resting upon the other, one of said members beingdesigned to provide for a strong connection between the attaching lugand the body of the shoe, and the other with especial reference'tosecuring an extensive bond between the back as a whole and the shoe` toprevent the back from being stripped from the shoe. Thehmemberfirstreferred to is designated by the reference character 5, and isin'the form of a plate extending longitudinally of the shoe and to thecentral port-ion of which plate, a

lug (i, whereby the shoe is supported from af brake head, is secured.The connection between the lug and the plate 5 may be 'formed in anyway; in Fig. .3 I'have shown the lug as having inturned portions at itslower end which lie beneath the plate.

The second member of my improved remforcing back is foraminous, so thatthe metal from which the body portion of the shoe is formed may lengagetherewith at a large'- number of points or places, and which memberiwilltherefore be embedded in the body of the shoe in such a manner that astrong bond will be procured between the same and 5 the shoe. Thisforaminous member isshown as comprising a piece of expanded metal 8, thecentral portion of which is cut away as shown at`9 in order that it maylit over the lug 64above referred, to'and through'which 10' opening saidlug projects. This foraminous or expanded metal member occupies aposition above the plate 5 hereinbefore referred to, so'that anytendency of the said plate to be stripped from the shoe by means offorces A transmitted to it through the lug, is resisted not only by suchanchorage as may exist be` tween it and the body of the shoe, but alsoby the foraminous or expanded metal plate 8 which is embedded in, andthoroughly bonded over, the ent-ire surface of the shoe.-

I It will, therefore, be seen that considering the hachas made up of thetwo separate members referred t-othe same is bonded I throughout theentire area 'of theback because of the foraminous member 8, Aand thatAforces `transmitted through the attaching lugact directly upon the'plate 5 at a point where the area is such that the lug cannot be pulledtrom` the shoe by such forces .as are commonly encountered when the shoeis in use.

I prefer toprovide openings suon as are shownl at 10 in vthe platemember 5, so that the metal from which the body is formed mayextendtherethroughA and embed a corresponding area of the overlying foraminousmember 8 to thereby form a strong connection between the body of theshoe and the central portion of said oraminous mem- 40 ber; whereby theforaminous member is bonded directly with the body of the shoe along itsentire periphery, and also throughcut central portions of considerablearea. It will be understood thatinmaking a brake shoe provided with myimproved reinforcing back, the supporting lug 6 and plate 5 areassembled and the fora-minous member 8 placed upon the plate 5,(afterwhich the entire member, thus formed, is placed in a m'old into whichthe molten body metal ispoured, whereupon the' entire back becomesembedded in the rear surface or back of the finished shoe.

It will be further understood that in the back, constructed as abovedescribed, I obtain the advantageous features of both a wrought metalplate and a plate of eX- panded metal, that is, I` secure, by means ofthe metal plate, suilieient strength whereby to retain the parts orsegments of the shoe Atogether in case the latter be broken in service,and also a back which may be firmly embedded and securely 'anchored inthe body of the shoe', afeature. characteristic of ex'-Y bedded in therear `face of a brake shoe and comprising a plate member,A an' attachinglug formed separate from and m engagement wlth said plate member, and aforamlnous member overlying said.. plat-e member and a portion of whichis cut away to pro- -vide an opening through which said 'attach-1 inglug' projects.

3. A reinforcingback adapted to be embedded in the rear lface of abra-ke shoe and comprising a. plate member, an attaching lug formedseparate from and in engagement with said plate member, and an expandedmetal member overlying said plate` member and a portion'of which is cutaway to provide anopening through which said attaching lug projects.. i

4. A reinforcing back adapted to be eina bedde'd` in the rear face of abrake shoe and comprising a plate member, means engaging said platemember'or supporting the shoe, and a second member overlying said platemember and made Afrom expanded metal.

5. A reinforcing back adapted'to be embedded in the rear-.face of abrake shoe and comprising a plate member4 having a centrally locatedprojecting lug, and a foraminous'member overlying 4said plate member andhaving fa centrally located opening through which said lugr extends.

6. A reinforcing back adapted to be embedded inthe rear face of a brakeshoe and comprising a plate member, a centrally located attaching lug inengagement with said plate member; and a foraminous member overlyingsaid plate member, the central portion of said foraminous member beingcut away to 4provide an .opening through which said lug' extends. Signedat Mahwah, in the count-y of B er gen, and State of New Jersey, this10th ivy of April, A. D. `1912.

WILLIS CHIPIS.

` lllitnesses:

' MARY A. CoUN'rnY, Crus. N. vVINTER.V

Copies of this patent may be obtained forve cents each, by addressingthc y Comm.l zsioner of Patents,

T',;s1aington, D. C.

